Incandescent mantle.



No. 803,798. PATENTED NOV. 7, 1905.

A. I. VAN VRIESLAND.

INGANDESGENT MAN'I'LE.

APPLIGATIOH nun JUNE 1. 1905.

"UNITED, STATES PATENT OFFICE.

INCANDESCENT MANTLE.

Specification of Letters Patent.

Patented Nov. *7, 1905.

Application filed June 1, 1905. Serial No. 263,356.

To all whom, it nuty concern:

erlands, have invented new and useful Improvements in IncandescentMantles, of which the following is a specification.

The subject of my invention is a woven incandescent mantle, whichdiffers from prior like mantles, inasmuch as it is made of socalledcross-woven fabric or gauzethat is to say, of webbing in which betweeneach two weft-threads the Warp-threads or groups of warp-threads aretwisted or crossed.

Hitherto there have been employed only knitted mantles and mantles ofwoven fabric, the threads of which crossing at right angles or obliquelyrun in a straight line.

The disadvantage of knitted mantles is that during the process ofburning off the article is liable to shrink, whereby the meshes arecontracted and the illuminating power thus detrimentally affected.

Woven mantles, again,with threads running only in a straight line havethe defect that the threads are not sufficiently intimately connectedone with the other, so that during the various operations to which thehose is submitted before the mantle is actually finished the relativepositions of the threads get altered. This is decidedly disadvantageousboth in respect to the durability and the appearance of the mantle.Furthermore, when such plain woven hose is severed the edges readilyfray, so that waste of the web and of the incandescent material isunavoidable.

By employing cross-woven fabric for mantles, on the other hand, theinextensibility of the article is maintained, and thus contraction ofthe meshes on burning off avoided, while great strength and firmness isinsured, since the threads are exceedingly intimately interwoven.

The new mantle thus unites the advantages of high illuminating power andgreat durability.

My invention is illustrated in the accompanying drawings, in whichFigure 1 is an elevation of a cross-woven mantle. Figs. 2 and 3 aredetail views, drawn to a larger scale, illustrating, by way 0f.eX ample,two of the many kinds of cross-woven fabrics which may be used.

a are the weftthreads, and Z) the warpthreads, which are turned ortwisted together, so that they do not run in a straight line, and, aswill be seen from the drawings, the warpthreads 6 are arranged so thatthe weft-threads a pass over every alternate and under every alternatewarp-thread 6, said warp-threads being arranged in pairs, each pairbeing separated from the succeeding pair and one of the threads of onepair crossing over upon its fellow thread between each successiveweft-thread.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

As an article of manufacture, a mantle for incandescent gas lightingpurposes having weft-threads a and warp-th reads 6, said threads beingtreated with an incandescing material, said warp-threads I) beingarranged in pairs, said pairs of warp-threads being separated from eachother, the weft-threads a passing over every alternate warp-thread b andunder every alternate warp-thread b, one of said warp-threads of eachpair of warp-threads crossing over upon its fellow warp-thread betweeneach successive weft-thread a, said weftthreads 0 being separated fromeach other in such manner that open meshes are formed by the said weftand warp threads and said threads are held in their proper relativepositions during the treatment of the fabric, and uniformity of themeshes of the incandescing material insured after the burning out of thefabric.

In witness whereof I have hereunto signed my name, this 15th day of May,1905, in the presence of two subscribing witnesses.

ADOLPHE ISIDORE VAN VRIESLAND.

WVitnesses:

HENRI ANTOINE SCHMITT, GERRIT HENDRIK SCHMITT, Jr.

